Roller-ball pens, water based gel ink, acid free, water, fade and chemical proof •Archival quality ink, no smears, feathers, or bleed-through on most papers. •Meets ACMI non-toxicity standards Application • The metallic colors give a pearly shine and the flow is smooth as silk. • Personalise your greetings, invitations and signatures and let your writing stand out • Write and decorate light and dark surfaces and work effortlessly on glossy and matte surfaces. • Use for writing, art and craft , card making and decorating in books, scrapbooks, journals